Hydraulic Ram Pumps for Irrigation in Northern Thailand

Inthachot, Matthias; Saehaeng, Suchard; Max, Johannes F. J.; Müller, Johannes; Spreer, Wolfram

doi:10.1016/j.aaspro.2015.08.015

Cited by 31 publications

(19 citation statements)

References 4 publications

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“…This -combined with the reliability provided by possessing a limited number of moving parts (the valves themselves) -means that ram pumps are still employed in rural and developing regions, even though the principles of their operation have changed little since the 18th century [16].…”

Section: Hydraulic Ram Pumpsmentioning

confidence: 99%

Generating renewable power from water hammer pressure surges

et al. 2019

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This article presents a system that makes use of the water hammer, which occurs when a fluid is subjected to a sudden change in momentum, to drive a piston-crank mechanism for power generation. Given that the magnitude of a water hammer is dependent upon the change in momentum experienced by the water, rather than the initial momentum itself, such a device may have applications operating as a pico scale hydropower device. The results of an experimental study are detailed, showing that a scale-model has a peak mechanical efficiency of 25.7 % and a mean efficiency of between 0.3-1.7 %. Potential applications for a refined version of the technology, namely picoscale hydropower generation and energy recovery from surge tanks, are also discussed.

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Section: Hydraulic Ram Pumpsmentioning

confidence: 99%

Generating renewable power from water hammer pressure surges

et al. 2019

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“…Pompa hydraulic ram (hydraulic ram) adalah perangkat yang memanfaatkan energi yang tersedia pada aliran terjunan air untuk memompa sebagian air tersebut ke tempat yang elevasinya lebih tinggi tanpa menggunakan energi listrik atau bahan bakar minyak [1,2]. Pompa hydraulic ram pertama kali dirancang di Inggris pada akhir abad ke-18 oleh John Whitehurst, yang aslinya diberi nama "pulsation engine".…”

Section: Pendahuluanunclassified

Pengaruh Diameter Lubang Snifter-Valve Terhadap Peningkatan Tekanan Dalam Tabung Udara Pompa Hydram

Sucipta

Suarda

Suweden

2019

JEM

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Pompa hydram telah banyak diaplikasikan terutama di daerah pedesaan atau perbukitan dimana ketersediaan suplai energy listrik menjadi kendala. Pompa hydram adalah pompa mekanis yang memanfaatkan peningkatan tekanan (water hammer) yang terjadi akibat mekanisme penutupan katup limbah secara tiba-tiba. Untuk itu pada badan pompa hydram dipasang tabung udara untuk mengurangi denyutan aliran air hasil pemompaan. Dalam kurun waktu tertentu operasi pompa hydram, jumlah udara yang ada dalam tabung udara akan terus berkurang. Untuk menggantikan volume udara dalam tabung udara tersebut maka pompa hydram dilengkapi dengan katup penghirup udara (snifter-valve). Namun dalam implementasinya, katup ini hanya berupa lubang berdiameter 1 ÷ 2 mm pada jarak sekitar 2 cm di bawah katup tekan pada badan pompa hydram. Namun sampai saat ini belum ada acuan diameter lubang snifter-valve tersebut. Oleh sebab itu, pada penelitian ini diinvestigasi besarnya peningkatan tekanan yang terjadi dalam tabung udara pompa hydram. Pada penelitian ini pompa hydram dilengkapi dengan katup hirup dengan variasi diameter lubangnya yaitu 0,5, 1,0, 1,5, 2,0 dan 2,5 mm. Hasil penelitian menunjukkan bahwa pada model pompa hydram dengan pipa penggerak berdiameter 1¼ inchi yang diuji, peningkatan tekanan yang terjadi dalam tabung udara berkisar antara 0,4 sampai dengan 0,5 bar. Snifter-valve dengan lubang berdiameter 1,5 mm menghasilkan peningkatan tekanan water hammer tertinggi dalam tabung udara sehingga memberikan kerja tertinggi yang terjadi dalam pompa hydram. Hydraulic ram pumps have been implemented and installed mainly in hilly or remote area where they are facing public electrical supply problem. Hydraulic ram pumps are mechanical pumps that utilize the increased water hammer due to the sudden shutdown mechanism of the waste valve. Therefore, the hydraulic ram pump is equipped with air vessel to reduce the pulsation of the pumping water flow. Within a certain period of hydraulic ram pump operation, the amount of air present in the air vessel will continue to decrease. In order to replace the air volume in the air vessel, the hydraulic ram pump is equipped with a snifter-valve. However, in its implementation, this valve is only a hole with a diameter of 1 ÷ 2 mm at a distance of about 2 cm below the delivery valve on the body of the hydraulic ram pump. However, there has not been any reference for determining the diameter of the snifter-valve hole yet. Therefore, in this study, works carried out for investigating the magnitude of the increased pressure that occurs in the air vessel of hydram pump. In this study, a hydraulic ram pump equipped with a snifter-valve with various orifice diameters of 0.5, 1.0, 1.5, 2.0 and 2.5 mm. The results show that for the hydraulic ram pump model with 1¼ inch diameter of the drive pipe that tested, the incrising pressure in the air vessel is about 0.4 up to 0.5 bar. The snifter-valve with 1.5 mm orifice diameter generates the highest incrising pressure of water hammer pressure in the air vessel, therefore, it gives the maximum work in the hydraulic ram pump.

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“…Yang et al [18], by using experimental evaluation, showed that adding a short cambered di user between the elbow and the impulse valve in the ram pump increased the ram pump e ciency to 53 percent. Inthachot et al [19] added an o -the-shelf clap check valve to the ram pump, which led to increase in the e ciency of pump by over 30 percent. The results of the eld observations showed that this ram pump supplied the irrigation of lands for the Northern area of Thailand with e ciency of 44 percent in the range of six weeks.…”

Section: Review Of Previous Studiesmentioning

confidence: 99%

Experimental Evaluation of Effective Parameters on Characteristic Curves of Hydraulic Ram-Pumps

Fatahi-Alkouhi

Lashkar-Ara

2017

Scientia Iranica

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9The effects of non-dimensional parameters on the characteristic curves of a ram pump were evaluated 10 in this study using an experimental model. To do so, after providing dependent and independent 11 parameters using dimensional analysis, effect of each independent parameter was examined on the 12 dependent parameter. Experimental observations showed that relative pumping discharge (q/Q T ), 13 relative wasting discharge (Q/Q T ) and pump efficiency (η) were depended on length to diameter ratio

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Hydraulic Ram Pumps for Irrigation in Northern Thailand

Cited by 31 publications

References 4 publications

Generating renewable power from water hammer pressure surges

Generating renewable power from water hammer pressure surges

Pengaruh Diameter Lubang Snifter-Valve Terhadap Peningkatan Tekanan Dalam Tabung Udara Pompa Hydram

Experimental Evaluation of Effective Parameters on Characteristic Curves of Hydraulic Ram-Pumps

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